Musculus tensor tarsi is a Latin term referring to the muscle that controls the eyelid. This term is spelled using the International Phonetic Alphabet (IPA) as /mʊskjʊləs ˈtɛnsər ˈtɑrsi/. The /s/ sound at the end of "musculus" and the beginning of "tensor" are spelled using the letter "s" in English, while the /ʊ/ sound is spelled with the letter "u". The pronunciation of "tarsi" includes the /r/ sound, which is often silent in English, and is spelled with the letter "r" in Latin.
Musculus tensor tarsi is a Latin term that refers to a small, delicate muscle located within the eyelid known as the eyelid muscle. The eyelid is composed of various muscles that enable its movement and functionality, and the musculus tensor tarsi is one such muscle.
This muscle is responsible for maintaining the shape and curvature of the upper eyelid. It originates from the anterior aspect of the lacrimal bone, a small bone located on the inner side of the eye socket. It then attaches to the tarsal plate of the eyelid, which is a thick, fibrous structure that provides structural support and stiffness to the eyelid.
When the musculus tensor tarsi contracts, it influences the position and alignment of the upper eyelid. It helps in elevating the eyelid, which is essential for the proper functioning of the eye. This muscle also plays a role in assisting tear drainage by aiding the pumping action of the lacrimal gland, which produces tears.
A dysfunction or weakness in the musculus tensor tarsi may lead to eyelid malpositioning or eyelid abnormalities such as ptosis (droopy eyelid) or entropion (inward turning of the eyelid), affecting both the cosmetic appearance and the function of the eye.
Overall, the musculus tensor tarsi is a crucial muscle for maintaining the structural integrity and movement of the upper eyelid, thereby contributing to optimal vision and eye health.
Horner's muscle, pars lacrimalis of orbicularis oculi.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.